Cavalry Charge is a plain and simple knight tribal deck, though the Esper (white, blue, black) MTG color combination provides a new wrinkle for the tribe
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This will limit their ability to play new cards, and when Mawile attacks with Crunch, one energy will be discarded from your opponent's active Pokemon at random, further limiting the offensive ability of the Pokemon in the opponent's active slot or on the bench
At a 3/4 vigilance for three mana, its just efficient enough to make the cut while giving you a nice discount on some spells for the rest of the game
If youre into Pokmon cards purely for monetary gain, this card means nothing to you
On the other hand, it isn't recommended to do so, as emulation comes with its own risks